Modernity development of architecture and urban planning during the Pahlavi Era has been more manifested in the physical aspects of the house rather than the semantic and content factors, which have been considerably changed and critical in the contemporary era. It can be claimed that the quality of residence and settlement of the house and the relationship between individuals and space have mainly changed since the Pahlavi Era. Like other developing countries, the renovation process became critical in Iran, and the cultural aspect was ignored in the economic and social planning despite the available few experiences. In that era, the architectural body that always was mixed with cultural concepts became separated from them. This study addresses the cultural factors, architecture, and urban rules affecting the physical changes in the houses constructed during Pahlavi I, Pahlavi II, and post-revolution periods. The main question asks how the changes in construction and renovation rules affect the pattern of houses in the Pahlavi Period, as well as the physical pattern of houses. This study aims to find the effect of evolutions in the spatial patterns of Iranian houses and the house construction and design rules as independent variables on the spatial features of modern houses as the dependent variable during two periods of Pahlavi (I and II) and after the revolution in Tehran. The data are collected through case studies and documentary samples. The research method is qualitative based on the historical-descriptive technique. The data summarization has been done based on the content analysis to assess the effective data and components. Finally, the examinations are done in the house patterns of each period. The results indicate that indicators of architectural patterns and construction rules have affected the different social classes in each period. The advent of modern architecture and laws of municipalities (that act as law enforcers) provided the field for such changes and evolutions. These rules led to some pattern changes and the loss of Iranian architectural indicators due to their imposed restrictions. Moreover, the government-people-architects convergence played a vital role in urban and architectural modernization and evolution.